Seal-press.



No. 740,185. PATBNTED SET. 29, 1903 A B. 3030mm).-

SEAL PRESS.

v- APPLIOATIGK FILED IAN. 13,1903.

R0 MODEL.

Ivzvemfiva I M.

UNITED STATES Patented September 29, 1903. V

PATE T OFF-ICE.

ALBERT B. SOHOFIELD, OF NEW YORK, N. Y., ASSKGNOR. TO KEYSTONE SEAL & PRESS COMPANY, NEW JERSEY.

on NEW YORK, N. Y., A CORPORATION on SEAL-PRESS.

SEEGIFICATION forming part of Letters Patent No. 740,185, dated September 29, 1903.

' Application filed January 13, 1903. Serial No. 138,860. No model-2 T0 ail whom it 11mg concern.

Be it known that I, ALBERT B. SCHOFIELD,

a citizen of the United States, and a resident of the borough of Brooklyn, in the city and State of New York, have invented anew and useful Seal-Press, of which the following is a specification.

My invention relates to a seal-press of the ratchet type for compressing a soft-metal seal by successive strokes of the operating lever or handle.

The object of my invention is to provide a powerful press of this character which shall be simple in its structure and not liable to get out of order under the rough usage to which presses of this character are liable to be subjected.

A practical embodiment of my invention is represented in the accompanying drawings, in which- Figure 1 is a view of the press in side elevation, a part of the frame being broken away to show the shape of the cam. Fig. 2 isa partial vertical longitudinal section, and Fig. 3 is a transverse section taken in the plane of the line A A of Fig. 2.

The stationary jaw is denoted by 1. It terminates at one end in a handle 2 for the convenient grasp of the hand of the operator and at its opposite end is provided with a pair of uprising ears or lugs 3 and 4;, between which there is a bed 5 for thereception of the seal to be operated upon. The operating-cam is mounted on an axle 6, extending through the ears 3 and 4. In the present instance I have shown the axle 6 as provided with a screwhead '7 and a screw-threaded end 8, which screws into the hole in the ear 4. It is obvious, howevery'that a pin riveted in the ears might be utilized as an axle in the place of the screw shown.

The cam loosely mounted on the axle 6 consists of a centralcylindrical portion 9 and two end portions in proximity to the central portion 9, the said end portions being denoted, respectively, by 10, identical in their shape and each made eccentric with respect to the axle 6, on which the cam rotates, and each provided with a flattened portion-l1,intermediate of that part of the periphery of the cam which is farthest from the axle 6 and that part of the periphery of the cam which is nearest the axle 6, for the purpose of relieving the movable jaw of the press from its work when the compression has been completed.

A removable jaw,-in the present instance a bar spring, has its shank 12 secured to the inner faceof the stationary jaw 1 and its free end located over the bed for receiving the metal seal, the tension of the spring-bar being such that it normally lifts itself away from the bed 5. The free end of said spring-jaw is. provided with'a pair of upwardly-extending ears or lugs 13 14, which are intended to straddle with an easy fit the central portion 9 of the cam, and the tops of said ears 13 14 are intended to press against the peripheries of the cams 10 to bring the spring-jaw immediately under the control of the cam to be operated by them and at, the same time to hold the cams against a retrograde movement under the strokes of the actuating-lever. It is intended that the ears 13 14 shall substantially fill the space between the ears or lugs 3 and 4 on thestationary jaw and the central cylindrical portion 9 of the cam. The periphery of the central cylindrical portion 9 of the cam is provided with a series of indents 15 of ratchet character for receiving the end of an operating-dog, to be hereinafter described, to rotate the cam step by step.

For the purpose of throwing the cams promptly into position to release'the springjaw after the compression is coin pleted I omit one of the indents 15 on the periphery of the central portion 9 of the cam, so that it will require a full open throw of the operatinglever, as shown in dotted lines, to advance the cam, thereby insuring a rotary movement of the cam sulficient to effect a full release at that point-that is to say, that after the cam has approached the point of greatest eccentricity, and therefore pressed the movable die-jaw into approximately the limit of its movement toward the stationary jaw, the further rotary movement of the cam can be effected only by swinging the handle of the movable jaw wide open a quadrant swing or thereabont-in order to catch the tooth or indent next following the blank where the in dent is omitted, and this will, when the handles are closed, swing the cam into the position of least eccentricity with respect to the movable jaw-t. 6., will throw the movable jaw wide open from the stationary jaw.

The operating-lever is denoted by 16. It terminates at one end in a handle 17, corresponding to the handle 2 on the stationary jaw, and at its opposite end it is provided with a bore 18,extending transversely through 'its head for the reception of the cylindrical portion 9 of the cam with an accurate rotary fit.

The width of the head of the lever 16 is intended to correspond to the space between the ears or lugs 13 14 on the spring-jaw and also to the exact width of the central portion 9 of the cam.

The top or back of the lever 16 is provided at a considerable distance back from its head with an offset 19, and a bore 20 extends from the offset toward the axis of the cam through the wall of the bore 18.

The dog 21 for engaging the indents 15 in the periphery of the part 9 of the cam is quite long and is seated with an easy-sliding fit in the bore 20. It is pressed normally toward the periphery of the portion 9 by means of a spring 22, located in the bore fZO back of the dog, the spring resting against a plug 23, fixed in the rear end of the bore 20. In the present instance the plug 23 is shown screwthreaded, so that it may be removed, if necessary, and access obtained to the spring and dog for repair or renewal in the event it is required, and this without in any wise disturbing the remainder of the operating parts of the press. Oil-ducts 24 25 are tapped through the head of the lever 16 into the bores 20 and 18 for the purpose of keeping the parts lubricated.

In operation, the seal having been placed between the spring-jaw and the bed 5, the lever 16 may be operated step by step, producing a gradual compression or a step-bystep compression of the metal seal as the spring-jaw is forced by the earns 10 toward the bed 5. When the cams 10 have been turned sufficiently to complete the compression, they will release the spring-jaw by a further rotation to bring the flat portions of the cams into engagement with the ears or. lugs 13 14 of the spring-jaw.

spring-jaw and by the spring-actuated dog which it carries. The entire width of the head of the operating-lever is utilized as bearingsurface, and there is no liability of the operating-lever working loose on the central portion 9 of the cam, while access to the dog carried by the operating-lever may be readily had.

What I claim is- 1. Aseal-press comprisingastationaryjaw, a movable jaw, a rotary cam for operating the movable jawand provided with a cylindrical bearing with ratchetindents in its periphery, an integral operating-lever having a transverse bore fitted to receive the said cylindrical bearingand a spring-actuatedvdog carried by the operating-lever and adapted to lock the lever to the cam.

2. A seal-press comprising a stationaryjaw, a rotary cam mounted therein and provided with a central cylindrical portion having indents in its periphery, a spring-actuated jaw fixed to the stationary jaw and provided with a pair of ears or lugs, an operating'lever having a transverse bore in its head fitted to receive the said central cylindrical portion of the cam, the said ears or lugs on the springactuated jaw being fitted to embrace with a close-sliding fit the opposite sides of the head of the operating-lever and said central cylindrical portion of the cam, and a dog for looking the lever to the cam.

3. Aseal-presscomprisingastationaryjaw, a movable jaw, a cam for operating the movable jaw, a locking-dog, and an operatinglever, the said integral operating-lever being providedwith a transverse bore for the recep 9 tion of the cam and with a longitudinal bore for the reception of the dog;

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 10th day January, 1903.

ALBERT B.- SOHOF-IELD.

Witnesses:

FREDK. HAYNES, HENRY THIEME. 

